Meteorological Observations. 159 



in this fluid some time, the external investment bursts, and allows the 

 protrusion of globular masses of sarcous matter, as in Leucophrys, but 

 not to such a great extent. — Proceedings of the Academy of Natural 

 Sciences of Philadelphia, vol. iv. p. 233. 



METEOROLOGICAL, OBSERVATIONS FOR DEC. 1849. 



Chiswick. — December 1. Very fine. 2. Heavy rain throughout. 3. Rain. 

 4. Hazy clouds: fine : frosty. 5. Rain with fog : overcast at night : slight frost. 

 6. Clear sky and low ground-fog : exceedingly fine. 7. Overcast. 8. Rain : 

 cloudless, and very fine. 9. Frosty and foggy : fine : dense fog. 10. Foggy : 

 uniform haze: overcast. 11. Overcast. 12. Foggy: cloudy and cold. 13. 

 Slight drizzle : hazy. 14. Rain: drizzly. 15. Rain : clear at night. 16. Cloudy: 

 very fine: drizzly. 17. Boisterous: fine: clear. 18. Densely overcast: rain. 



19. Cloudy: fine: clear. 20. Clear and fine. 21. Slight snow-showers. 22. 

 Frosty : densely clouded. 23. Clear and frosty : cloudless : clear and frosty. 

 24. Hazy : slight snow : cloudy at night. 25. Clear and fine. 26. Drizzly : 

 densely overcast. 27. Clear. 28. Drifting snow : clear and frosty throughout : 

 severe frost at night. 29. Cloudy : clear. 20. Clear. 31. Cloudy : fine : overcast. 



Mean temperature of the month 37°*17 



Mean temperature of Dec. 1848 41 '75 



Mean temperature of Dec. for the last twenty- three years 39 "85 

 Average amount of rain in December 1*58 inch. 



Boston. — Dec. 1. Fine. 2. Rain: rain a.m. and p.m. 3. Rain: rain a.m. 

 4. Fine. 5. Cloudy : rain a.m. and p.m. 6. Fine. 7. Cloudy. 8. Rain : 

 rain a.m. 9. Fine. 10. Cloudy. 11. Rain: rain a.m. and p.m. 12. Fine. 

 13,14. Cloudy. 15. Cloudy: rain a.m. and p.m. 16. Fine. 17. Cloudy: rain 

 early a.m. 18. Cloudy: rain a.m. and p.m. 19. Fine: rain a.m. and stormy. 



20. Fine. 21. Cloudy: rain a.m. 22. Cloudy. 23. Fine. 24. Cloudy: 

 rain a.m. 25. Cloudy. 26. Fine. 27, 28. Fine : stormy. 29. Fine : 

 snow a.m. 30. Fine. 31. Cloudy. 



Applegarth Manse, Dumfries-shire. — Dec. 1. Frost a.m.: fog: wet p.m. 2. 

 Storm of wind and rain. 3. Blowing hard : wet : calm p.m. 4. Fine clear frosty 

 day. 5. Snow a.m : wet p.m. 6. Rain and wind. 7. High wind: rain p.m. 

 8. Rain, but not heavy. 9. Fog and light rain. 10. Fog all day. 11. Fair and 

 frosty. 12. Clear and cold. 13. Dull and cold: sleet p.m. 14. Fine a.m. : 

 cloudy and stormy p.m. 15. Foggy, with showers. 16. Fine a.m. : dull and 

 damp p.m. 17. Fine, with slight showers. 18. Wet all day. 19, 20. Slight 

 frost: fine. 21. Slight frost : fine : cloudy. 22. Slight frost: clear and fine. 23. 

 Hard frost : cloudy p.m. 24. Change : soft : slight shower. 25. Frost again : 

 mild p.m. 26. Slight frost: shower p.m. 27. Frost: clear: high wind p.m. 

 28,29. Very hard frost : sprinkling of snow. 30. Frost: clear and fine. 31. 

 Frost very hard : thermometer 18°. 



Mean temperature of the month 37°*1 



Mean temperature of Dec. 1848 39*8 



Mean temperature of Dec. for the last twenty-five years ... 38 *1 



Mean rain in December 1*40 inch. 



Ditto average for twenty years in December 2*94 inches. 



Sandwich Manse, Orkney. — Dec. 1. Fine : cloudy. 2,3. Showers. 4. Snow- 

 showers. 5. Showers. 6. Cloudy : clear. 7. Cloudy : drizzle. 8. Showers : 

 drizzle. 9. Cloudy : showers : rain. 10. Drizzle : clear : aurora. 11,12. Cloudy: 

 clear : aurora. 13. Cloudy. 14. Rain: cloudy. 15. Cloudy : showers. 16. 

 Rain : showers: clear. 17. Cloudy : showers.. 18. Showers: damp : showers. 

 19. Bright : showers : sleet. 20. Fine: frost: fine. 21. Fine : frost : aurora. 

 22. Clear : frost : hazy. 23. Rain : cloudy. 24. Fine : damp. 25, 26. Showers. 

 27. Hail-showers. 28. Snow-drift: thunder: snow-drift. 29. Cloudy: clear. 

 SO. Showers • cloudy. 31. Clear : cloudy. 



